/Engine/Source/Runtime/SlateCore/Public/Widgets/SWidget.h
Sets an additional culling padding that is added to a widget to give more leeway when culling widgets. Useful if several child widgets have rendering beyond their bounds.
FORCEINLINEvoid SetCullingBoundsExtension ( const [FMargin](API\Runtime\SlateCore\Layout\FMargin) & InCullingBoundsExtension )